CN2753067Y - VOIP telephone terminal - Google Patents
VOIP telephone terminal Download PDFInfo
- Publication number
- CN2753067Y CN2753067Y CN 200420150365 CN200420150365U CN2753067Y CN 2753067 Y CN2753067 Y CN 2753067Y CN 200420150365 CN200420150365 CN 200420150365 CN 200420150365 U CN200420150365 U CN 200420150365U CN 2753067 Y CN2753067 Y CN 2753067Y
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- codec
- sound
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- telephone terminal
- data processor
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- Telephonic Communication Services (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The utility model relates to a novel VOIP telephone terminal which comprises a coder-decoder and a data processor, wherein the coder-decoder is provided with a first sound input port and a sound output port, and the data processor is electrically connected with the coder-decoder. The data processor comprises an echo eliminator which is electrically connected with the coder-decoder. The coder-decoder is also provided with a second sound input port which is electrically connected with the sound output port. After sound signals input from the first and the second sound input ports are coded, the sound signals are respectively input to the echo eliminator by the coder-decoder. The echo eliminator compares the two sound signals, and eliminates the sound signals with the same code. The sound signals which are transmitted to a sound output device are fed back in the coder-decoder, the sound signals which are fed back are compared with the sound signals which are transmitted through the echo eliminator and the sound signals with the same code are eliminated. The utility model need not changing for hardware devices, and the cost of the whole telephone terminal is reduced.
Description
Technical field
The utility model relates to telephone terminal, especially about a kind of telephone terminal that is applied to the VOIP Internet phone-calling.
Background technology
When calling party and callee carry out the VOIP conversation, general loud speaker and the microphone of using, the analoging sound signal that loudspeaker plays is come out is received by microphone again, thereby echogenic situation when this voice signal is sent to the source end, and in Internet phone-calling, the delay of calling out is long again, thereby makes the situation of echo more serious, has influenced calling quality greatly.
At above-mentioned shortcoming, prior art has proposed a kind of VOIP telephone terminal, this terminal comprises codec, microphone, loud speaker and data processor, and microphone, codec and data processor connect successively, and codec outputs to microphone with the callee's of reception voice signal.Microphone in this device has two, and it is connected with two input ports of codec respectively, and the voice signal of these two microphone outputs has phase difference, carries out echo elimination by the data processor that is solidified with algorithm according to this phase difference.Yet above-mentioned design has following shortcoming: 1) owing to need connect two microphones, thereby increased the cost of hardware; 2) owing to carry out echo elimination, make the algorithm of data processor become complicated, thereby the whole terminal equipment cost is increased according to phase difference.
The utility model content
The purpose of this utility model is to provide a kind of can eliminate echo and VOIP telephone terminal with low cost.
The purpose of this utility model is achieved in that this VOIP telephone terminal comprises codec and data processor, codec has the first sound input end mouth and voice output port, data processor is electrically connected with codec, data processor comprises Echo Canceller, this Echo Canceller is electrically connected with codec, codec also has the second sound input port, this second sound input port is electrically connected with the voice output port, codec will be respectively from first, be input to Echo Canceller behind the sound signal encoding of second sound input port input, Echo Canceller is above-mentioned two kinds of voice signals comparison, and the voice signal that will have a same-code is removed.
Also comprise acoustic input dephonoprojectoscope and voice output, acoustic input dephonoprojectoscope is connected with the first sound input end mouth of codec, and voice output is connected with the voice output port of codec.
Described Echo Canceller is a subtracter.
Compared with prior art, the utlity model has following advantage: 1) feed back to codec by the voice signal that will be transported to voice output, and the voice signal of voice signal that will feed back by Echo Canceller and former transmission comparison, the voice signal of same-code is removed, need on hardware device, not do change, reduce hardware cost; 2), the algorithm of whole terminal is oversimplified, thereby reduced the cost of whole telephone terminal because Echo Canceller can adopt simple subtracter.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model VOIP telephone terminal.
Fig. 2 is the circuit block diagram of the utility model VOIP telephone terminal when conversing.
Embodiment
See also Fig. 1 and Fig. 2, the utility model VOIP telephone terminal comprises codec 2, acoustic input dephonoprojectoscope 1, voice output 4 and data processor 3.Codec 2 comprises the first sound input end mouth, the second sound input port and voice output port, and voice output port and the electric connection of the second sound input port.The output of acoustic input dephonoprojectoscope 1 is connected with the first sound input end mouth of codec 2, and the output of codec 2 is connected with data processor 3, and data processor 3 is connected with existing communication network.The input of voice output 4 is connected with the voice output port of codec 2.
Acoustic input dephonoprojectoscope 1 is to be used for receiving the acoustic information that needs transmission, and it adopts prior art, as microphone.Codec 2 is to be converted to digital audio signal (i.e. coding) in order to the analoging sound signal that will receive, or digital audio signal is converted to analoging sound signal (i.e. decoding), and it can adopt existing codec 2.Data processor 3 comprise memory and with the Echo Canceller of its electric connection, memory is in order to the coded message of stored sound signal, Echo Canceller is in order to the coded message of voice signal that calling terminal need be sent and the coded message comparison of echo, and the voice signal removal of same-code will be had in above-mentioned two kinds of coded messages, realize echo cancelltion, this Echo Canceller can adopt existing subtracter.Voice output 4 is to play back in order to the voice signal that will receive, and makes the caller hear the other side's the content of speaking, and it adopts existing voice output, as loud speaker.
When carrying out the VOIP conversation, acoustic input dephonoprojectoscope 1 receives the voice signal of calling terminal, and the voice signal that will simulate is input to codec 2; Codec 2 converts this analoging sound signal to digital audio signal, and this digital audio signal is input to data processor 3; Data processor 3 these digital audio signals of storage also are input to the telephone terminal of called end by communication network with this digital signal, and the telephone terminal of called end plays back with this digital signal decoding and by voice output 4.The analoging sound signal of called end is input to the data processor 3 of calling terminal by communication network through the coding back, data processor 3 should be input in the codec 2 through coded sound signal and decode, and decoded analoging sound signal is input to voice output 4 and is played out.
In order to eliminate echo, can be when the voice signal that called end is sended over be input to voice output 4, this analoging sound signal is fed back to codec 2, this codec 2 is input to data processor 3 after with this sound signal encoding, the previous voice signal that sends of voice signal that data processor 3 will feed back and calling terminal compares, and by Echo Canceller the voice signal that this has same-code is removed, eliminate the voice signal that the called end after the echo sends like this and play back by voice output 4 through codec 3 decoding backs again.The feedback of above-mentioned voice signal can be connected by lead with the second sound input port by the voice output port with codec 3 and realizes.In communication process, the echogenicity if the part voice signal that the voice output of calling terminal 4 is play is input in the acoustic input dephonoprojectoscope 1, then can be blended in the voice signal of called end transmission behind this echo signal process calling terminal and the called end, and can re-enter the voice output 4 of calling terminal, then this echo signal can be removed by the effect of above-mentioned Echo Canceller.Certainly, the telephone terminal of called end also can adopt this feedback system and Echo Canceller, to reach the purpose of eliminating echo.
In the utility model, only need to feed back to codec 2 by the voice signal that will be transported to voice output 4, and the voice signal of voice signal that will feed back by Echo Canceller and former transmission comparison, the voice signal of same-code is removed, need on hardware device, not do change, and Echo Canceller can adopt simple subtracter, and the algorithm of whole telephone terminal is oversimplified, thereby reduced the cost of whole telephone terminal.
Claims (4)
1. VOIP telephone terminal, comprise codec and data processor, codec has the first sound input end mouth and voice output port, data processor is electrically connected with codec, it is characterized in that: data processor comprises Echo Canceller, this Echo Canceller is electrically connected with codec, codec also has the second sound input port, this second sound input port is electrically connected with the voice output port, codec will be respectively from first, be input to Echo Canceller behind the sound signal encoding of second sound input port input, Echo Canceller is above-mentioned two kinds of voice signals comparison, and the voice signal that will have a same-code is removed.
2. VOIP telephone terminal as claimed in claim 1, it is characterized in that: also comprise acoustic input dephonoprojectoscope and voice output, acoustic input dephonoprojectoscope is connected with the first sound input end mouth of codec, and voice output is connected with the voice output port of codec.
3. VOIP telephone terminal as claimed in claim 2 is characterized in that: described acoustic input dephonoprojectoscope is a microphone, and voice output is a loud speaker.
4. as any described VOIP telephone terminal among the claim 1-3, it is characterized in that: described Echo Canceller is a subtracter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420150365 CN2753067Y (en) | 2004-08-06 | 2004-08-06 | VOIP telephone terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420150365 CN2753067Y (en) | 2004-08-06 | 2004-08-06 | VOIP telephone terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2753067Y true CN2753067Y (en) | 2006-01-18 |
Family
ID=35914477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420150365 Expired - Fee Related CN2753067Y (en) | 2004-08-06 | 2004-08-06 | VOIP telephone terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2753067Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207644B (en) * | 2006-12-19 | 2010-08-18 | 中兴通讯股份有限公司 | Method for reducing influence caused by echo to subjective perception in VoIP communication |
| CN104010100A (en) * | 2014-05-08 | 2014-08-27 | 深圳市汇川技术股份有限公司 | Cancellation system and method for echo in VoIP communication |
| CN104811567A (en) * | 2014-01-23 | 2015-07-29 | 杭州乐哈思智能科技有限公司 | System and method for carrying out acoustic echo cancellation on two-way duplex hands-free voice of VOIP (voice over internet protocol) system |
-
2004
- 2004-08-06 CN CN 200420150365 patent/CN2753067Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207644B (en) * | 2006-12-19 | 2010-08-18 | 中兴通讯股份有限公司 | Method for reducing influence caused by echo to subjective perception in VoIP communication |
| CN104811567A (en) * | 2014-01-23 | 2015-07-29 | 杭州乐哈思智能科技有限公司 | System and method for carrying out acoustic echo cancellation on two-way duplex hands-free voice of VOIP (voice over internet protocol) system |
| CN104010100A (en) * | 2014-05-08 | 2014-08-27 | 深圳市汇川技术股份有限公司 | Cancellation system and method for echo in VoIP communication |
| CN104010100B (en) * | 2014-05-08 | 2016-10-19 | 深圳市汇川技术股份有限公司 | Echo cancelling system in VoIP communication and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN CITY ZHENHUA NEW CONCEPT OF NETWORK COMM Free format text: FORMER OWNER: XINGAINIAN SCIENCE + TECHNOLOGY DEVELOPMENT CO., LTD., SHENZHEN CITY Effective date: 20060728 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20060728 Address after: 518000, Shenzhen, Guangdong, Baoan District province Xixiang street, 44 Aberdeen Road, Zhenhua Industrial Building 2, building 2 East Patentee after: Shenzhen Koncept Network Communication Equipment Co. Ltd. Address before: 518010 Guangdong city in Shenzhen Province, Luohu District people's South shenfang Plaza A block, room 2802, 2801 Patentee before: Xingainian Science & Technology Development Co., Ltd., Shenzhen City |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |